Method main

reflection/HiddenImplementation.java:11–27

(String[] args)

public class HiddenImplementation {
  public static void
  main(String[] args) throws Exception {
    A a = HiddenC.makeA();
    a.f();
    System.out.println(a.getClass().getName());
    // Compile error: cannot find symbol 'C':
    /* if(a instanceof C) {
      C c = (C)a;
      c.g();
    } */
    // Oops! Reflection still allows us to call g():
    callHiddenMethod(a, "g");
    // And even less accessible methods!
    callHiddenMethod(a, "u");
    callHiddenMethod(a, "v");
    callHiddenMethod(a, "w");
  }
  static void
  callHiddenMethod(Object a, String methodName)
  throws Exception {